In the flowering period of fruit trees, such as rainy weather, it often leads to fruit tree yield reduction. The reasons are as follows

Because the rain prevented the pollen of anemophilous flowers from spreading with the wind; It will also prevent pollinators such as bees from going out, making it impossible for insect flowers to pollinate. Flowers that do not experience pollen under natural conditions are mostly barren. So it will reduce production.

Of course, this fact only applies to some common fruit trees, such as peaches, plums and apricots. For many other fruit trees, such as plants that can bear parthenocarpy without pollination, plants that pollinate themselves, plants that bloom for a long time or bear fruit many times a year, their yields are not affected by this factor.

I disagree with the above answer. In the question, it is clear that the rain in "flowering period" affects the yield. What should be emphasized is the effect on pollination. The above-mentioned interviewees may be affected by the reduction of grain yield of rice, wheat and other food crops if it rains during grain filling maturity. His answer can explain that phenomenon, but it cannot be copied to the problem of this fruit tree. Short-term rainy weather has obvious effects on plants with short maturity, such as rice and wheat, but has little effect on plants with long maturity, tall and strong fruits and more nutrients stored in their bodies.